Bridge:Conventions/Bergen
From Tractatus
Bergen(modified)
1♥
13-21hcp, and 5+ cards in the named suit.
2♥
7-9(10-) pts, exactly 3 cards in ♥
3♣
(Bergen) 7-9(10-) pts, exactly 4 cards in ♥
3♦
(Bergen) 10-12 pts, exactly 4 cards in ♥, it may be minimal GF, so after 3♥ it is possible to bid 4♥ (so no hesitation when bidding 3♥, please)
3♥
(Bergen) 0-6 pts, 4 cards in ♥
4♥
0-9 pts, 5 cards in ♥, singleton or void, NO ACES IN SIDE SUITS
1NT
forcing
2♣♦♥
For example.
2♥
5-6 pts, exactly 3 cards in ♥ or 6-9(10-) pts, doubleton support
3♥
10-12 pts, exactly 3 cards in ♥
4♥
0-9 pts, 5 cards in ♥, ACE IN A SIDE SUIT
3NT
13-15pts, exactly 3 small cards in ♥
3♠,4♣4♦
Splinter. 4+♥, 10-12hcp, singleton in named suit, no good side suits.
2NT
Jacoby. 4+♥, strong GF, no good side suits.